Premium
Seasonal course of translocation, storage and remobilization of 13 C pulse‐labeled photoassimilate in naturally growing Larix gmelinii saplings
Author(s) -
Kagawa Akira,
Sugimoto Atsuko,
Maximov Trofim C.
Publication year - 2006
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2006.01780.x
Subject(s) - larix gmelinii , xylem , dendrochronology , growing season , dendroclimatology , isotopes of carbon , botany , carbon fibers , agronomy , biology , δ13c , phenology , horticulture , stable isotope ratio , larch , ecology , materials science , physics , paleontology , composite material , quantum mechanics , composite number , total organic carbon
Summary• Autocorrelation – correlation of tree‐ring parameters such as ring width, density and isotope ratios to the environmental conditions of the previous year(s) – is associated with the use of previous photoassimilate for current year's tree ring formation. • To clarify the seasonal course of carbon allocation patterns among needles, branches, stem and roots, we pulse‐labeled 10 Larix gmelinii growing in a continuous permafrost zone with 13 CO 2 . • Photoassimilate incorporated in June was allocated mainly to above‐ground parts, indicating active above‐ground growth in spring. Very little was allocated to below‐ground parts (2.6–7.9%), probably because root growth is inhibited by low soil temperatures in spring. Conversely, a higher proportion of July and August photoassimilate was allocated to below‐ground parts (32–44 and 12–24%, respectively). • About half the carbon in new needles was derived from stored material. The starch pool in non‐needle parts, which can be used for xylem formation, drew approx. 43% of its carbon from the previous year's photoassimilate, indicating that carbon storage is a key mechanism behind autocorrelation in (isotope) dendroclimatology.